US4450709A - Internal combustion engine with engine knock sensor - Google Patents
Internal combustion engine with engine knock sensor Download PDFInfo
- Publication number
- US4450709A US4450709A US06/437,464 US43746482A US4450709A US 4450709 A US4450709 A US 4450709A US 43746482 A US43746482 A US 43746482A US 4450709 A US4450709 A US 4450709A
- Authority
- US
- United States
- Prior art keywords
- section
- engine
- wall section
- knock sensor
- engine knock
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 19
- 239000002826 coolant Substances 0.000 claims abstract description 9
- 238000009434 installation Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L23/00—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid
- G01L23/22—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines
- G01L23/221—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines for detecting or indicating knocks in internal combustion engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/18—Other cylinders
Definitions
- This invention relates in general to an improvement in a spark-ignition internal combustion engine, and more particularly to the installation location of an engine knock sensor for detecting engine knock.
- an engine knock preventing system which suitably retards spark timings in response to detected engine knock, thereby preventing continuation of the engine knock.
- engine knock detection is usually carried out by an engine knock sensor located at the outer wall section of a cylinder block.
- an engine knock sensor located at the outer wall section of a cylinder block.
- a difficulty has been encountered with the thus located engine knock sensor, in which sufficient sensing accuracy is not obtained since the engine knock sensor is not in direct contact with an engine cylinder wall which is subjected to engine knock.
- An internal combustion engine comprises a cylinder block having a cylinder wall section defining therein a cylinder bore, and an outer wall section located outside of the cylinder wall section.
- An engine coolant passage is formed between the cylinder wall section and the outer wall section.
- a boss section is formed at and projects from the cylinder block cylinder wall section, the boss section being formed with a threaded portion.
- An opening is formed at the cylinder block outer wall section and located at a position generally corresponding to the boss section to prevent the boss section from contacting the cylinder block outer wall section.
- an engine knock sensor is provided to sense engine knock and has a threaded portion which engages with the threaded portion of the boss section.
- a resilient seal member is disposed between the engine knock sensor and the cylinder block outer wall section to prevent engine coolant from leaking through the cylinder block outer wall section opening.
- the engine knock sensor is located to be directly subjected to engine knock, thereby improving engine knock sensing accuracy without being affected by noise vibration from a valve operating mechanism.
- FIG. 1 is a vertical sectional view of a conventional spark-ignition internal combustion engine provided with an engine knock sensor;
- FIG. 2 is a fragmentary sectional view showing the essential part of a preferred embodiment of a spark-ignition internal combustion engine according to the present invention, provided with an engine knock sensor;
- FIG. 3 is a fragmentary sectional view showing the essential part of another embodiment of the engine in accordance with the present invention.
- a cylinder block 1 of the engine includes a cylinder wall section 2 and an outer wall section 4, forming therebetween an engine coolant passage 3.
- An engine knock sensor 5 is installed to the cylinder block outer wall section 4 to sense engine knock vibration.
- high frequency engine knock vibration about 6-10 KHz in automotive engines
- the thus located engine knock sensor 5 is liable to be subjected to noise vibration from a valve operating mechanism in a cylinder head (not shown), and as such S(signal due to engine knock)/N (noise) of the output of the engine knock sensor 5 unavoidably lowers.
- FIG. 2 wherein a preferred embodiment of an internal combustion engine according to the present invention is illustrated by the reference numeral 10.
- the engine 10 of this embodiment is of the water-cooled and spark-ignition type and used for an automotive vehicle.
- the engine 10 comprises a cylinder block 12 which is formed with a plurality of cylinder wall sections 14 each of which defines therein a cylinder bore 14a.
- the cylinder wall sections 14 are surrounded by an outer wall section 16, forming therebetween an engine coolant passage or water jacket 18.
- one of the cylinder wall sections 14 is integrally formed at its outer surface with a boss section 20 which projects outwardly so that the tip surface 20b thereof is generally on the same plane as the flat surface portion 16a formed at the outer surface of the outer wall section 16.
- the boss section 20 is formed with a hole 20a having an interior screw which hole extends along the axis of the boss section.
- the outer wall section 16 is formed with an opening 22 which is so located that the boss portion 20 is disposed in the opening 22, leaving an annular space around the boss portion 20.
- An engine knock sensor 24 for sensing vibration due to engine knock is provided with a straightly projected section 26 with an exterior screw which section 26 extends in the direction of axis of the engine knock sensor 24.
- the projected section 26 is disposed into the boss section hole 20a so that the exterior screw of the former engages with the interior screw of the latter.
- the engine knock sensor 24 is formed with a thin cylindrical small diameter section 28 which is coaxial with the projected section 26.
- An annular resilient seal member or O-ring 30 is disposed along the outer periphery of the small diameter section 28 and seated on the flat surface 24a of the sensor 24 which surface faces the flat surface portion 16a of the cylinder block outer wall section 16 when the engine knock sensor 24 is installed in position.
- the annular seal member 30 is so located and has such an inner diameter as to surround the opening 22 of the cylinder block outer wall section 16 when the sensor 24 is installed in position. It will be understood that when the sensor projected section 26 is screwed into the boss portion hole 20a to tighten the screws of both, the seal member 30 is pressed in some extent between the flat surface portion 16a of the cylinder block outer wall section 16 and the flat surface 24a of the engine knock sensor 24, thereby providing an appropriate fluid-tight seal.
- the engine knock sensor 24 when engine knock is generated, vibration of the cylinder wall section 14 is directly applied to the engine knock sensor 24, thereby effectively detecting engine knock. Additionally, noise vibration at the cylinder block outer wall section is absorbed by the resilient seal member 30 and, as such the engine knock sensor 24 is hardly affected by such noise vibration. As a result, the engine knock sensor installed as above-mentioned can detect fine and weak engine knock vibration, thus greatly improving engine knock sensing accuracy. Besides, the resilient seal member 30 can elastically deform upon receiving relative vibration between the cylinder block outer wall section 16 and the engine knock sensor 24, and therefore it is kept in tight contact with the flat surface portion 16a of the cylinder block outer wall section 16 and with the flat surface 24a of the engine knock sensor 24, thus effectively preventing engine coolant from leaking.
- FIG. 3 shows another embodiment of the engine knock sensor 24 according to the present invention, in which the annular resilient seal member 30 is seated on a washer or metallic seat 32 and urged through the washer 32 into tight contact with the flat surface portion 16a of the cylinder block outer wall section 16 when the engine knock sensor 24 is installed in position.
- the washer 32 is of the annular shape, and formed with a central opening 32a and an annular groove (no numeral) in which the annular seal member 30 is located.
- the washer 32 is interposed between the tip surface 20b of the boss section 20 and the small diameter section 28' of the sensor 24 while locating the sensor projected section 26 in the washer central opening 32a. Accordingly, the resilient seal member 30 is brought into tight contact with the flat surface portion 16a of the cylinder block outer wall section 16 by virtue of the elasticity of the washer 32.
- the resilient seal member 30 is prevented from being distorted when the projected section 26 of the engine knock sensor 24 is screwed into the boss portion 20 of the cylinder block 12. Additionally, the contact of the resilient seal member 30 is tightened by an amount corresponding to resiliency of the washer 32, thereby improving the reliability of fluid-tight seal.
- the engine knock sensor installation boss portion is formed at the cylinder wall section of the cylinder block which wall is directly subjected to gas pressure vibration when engine knock occurs. This increases engine knock vibration level applied to the engine knock sensor, thereby noticeably improving engine knock sensing accuracy.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Measuring Fluid Pressure (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1981165112U JPS5871136U (ja) | 1981-11-05 | 1981-11-05 | 内燃機関のノツクセンサ取付構造 |
JP56-165112[U] | 1981-11-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
US4450709A true US4450709A (en) | 1984-05-29 |
Family
ID=15806128
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US06/437,464 Expired - Fee Related US4450709A (en) | 1981-11-05 | 1982-10-28 | Internal combustion engine with engine knock sensor |
Country Status (4)
Country | Link |
---|---|
US (1) | US4450709A (de) |
EP (1) | EP0079042B1 (de) |
JP (1) | JPS5871136U (de) |
DE (1) | DE3271438D1 (de) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4601196A (en) * | 1984-08-15 | 1986-07-22 | General Motors Corporation | Engine combustion chamber pressure sensor |
US4969441A (en) * | 1988-11-11 | 1990-11-13 | Mitsubishi Denki Kabushiki Kaisha | Knocking suppression apparatus for an internal combustion engine |
US20090120164A1 (en) * | 2007-11-08 | 2009-05-14 | Honeywell International Inc. | Method and system for estimating in-cylinder pressure and knocking utilizing an in-cylinder pressure sensor |
US9453453B2 (en) | 2011-07-20 | 2016-09-27 | Yamaha Hatsudoki Kabushiki Kaisha | Internal combustion engine and straddle-type vehicle equipped with the engine |
US9464956B2 (en) | 2011-07-20 | 2016-10-11 | Yamaha Hatsudoki Kabushiki Kaisha | Internal combustion engine and straddle-type vehicle equipped with the engine |
DE102018211169A1 (de) * | 2018-07-06 | 2020-01-09 | Bayerische Motoren Werke Aktiengesellschaft | Verbrennungskraftmaschine für ein Kraftfahrzeug, insbesondere für einen Kraftwagen, sowie Kraftfahrzeug |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58111364U (ja) * | 1982-01-26 | 1983-07-29 | 日産自動車株式会社 | ノツキング回避装置 |
DE3616636A1 (de) * | 1986-05-16 | 1987-11-19 | Porsche Ag | Luftgekuehlte mehrzylinder-brennkraftmaschine |
EP0671618B1 (de) * | 1994-02-10 | 1999-04-14 | K.K. Holding Ag | Kolben-Motoren und -Kompressoren mit Überwachungsanlage |
JP2016011587A (ja) * | 2014-06-27 | 2016-01-21 | 本田技研工業株式会社 | ユニットスイングエンジンにおけるノックセンサ取付け構造 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB401587A (en) * | 1932-04-15 | 1933-11-16 | Loewe Opta Gmbh | A spark plug with a piezo-electrical pressure-measuring device |
GB598360A (en) * | 1944-01-10 | 1948-02-17 | Sperry Gyroscope Co Inc | Improvements in and relating to vibration pick-up devices and to systems and apparatus utilising them |
DE2716712A1 (de) * | 1977-04-15 | 1978-10-19 | Burmeister & Wains Mot Mask | Kolbenmaschine mit einem fuehler, der in einer die arbeitskammer in einem zylinder umgebenden wand montiert ist |
US4153020A (en) * | 1977-07-26 | 1979-05-08 | The United States Of America As Represented By The Administrator Of The United States Environmental Protection Agency | Method and apparatus for spark control of engine knock |
US4225802A (en) * | 1978-02-23 | 1980-09-30 | Nippondenso Co., Ltd. | Piezoelectric knocking detector for internal combustion engine |
US4382377A (en) * | 1980-05-16 | 1983-05-10 | Siemens Aktiengesellschaft | Pressure sensor for an internal combustion engine |
US4408479A (en) * | 1981-02-09 | 1983-10-11 | Kabushiki Kaisha Toyota Chuo Kenkyusho | Knocking detecting device for internal combustion engines |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57170276A (en) * | 1981-04-14 | 1982-10-20 | Namuko Kk | Game machine |
-
1981
- 1981-11-05 JP JP1981165112U patent/JPS5871136U/ja active Granted
-
1982
- 1982-10-28 US US06/437,464 patent/US4450709A/en not_active Expired - Fee Related
- 1982-11-03 EP EP82110129A patent/EP0079042B1/de not_active Expired
- 1982-11-03 DE DE8282110129T patent/DE3271438D1/de not_active Expired
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB401587A (en) * | 1932-04-15 | 1933-11-16 | Loewe Opta Gmbh | A spark plug with a piezo-electrical pressure-measuring device |
GB598360A (en) * | 1944-01-10 | 1948-02-17 | Sperry Gyroscope Co Inc | Improvements in and relating to vibration pick-up devices and to systems and apparatus utilising them |
DE2716712A1 (de) * | 1977-04-15 | 1978-10-19 | Burmeister & Wains Mot Mask | Kolbenmaschine mit einem fuehler, der in einer die arbeitskammer in einem zylinder umgebenden wand montiert ist |
US4153020A (en) * | 1977-07-26 | 1979-05-08 | The United States Of America As Represented By The Administrator Of The United States Environmental Protection Agency | Method and apparatus for spark control of engine knock |
US4225802A (en) * | 1978-02-23 | 1980-09-30 | Nippondenso Co., Ltd. | Piezoelectric knocking detector for internal combustion engine |
US4382377A (en) * | 1980-05-16 | 1983-05-10 | Siemens Aktiengesellschaft | Pressure sensor for an internal combustion engine |
US4408479A (en) * | 1981-02-09 | 1983-10-11 | Kabushiki Kaisha Toyota Chuo Kenkyusho | Knocking detecting device for internal combustion engines |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4601196A (en) * | 1984-08-15 | 1986-07-22 | General Motors Corporation | Engine combustion chamber pressure sensor |
US4969441A (en) * | 1988-11-11 | 1990-11-13 | Mitsubishi Denki Kabushiki Kaisha | Knocking suppression apparatus for an internal combustion engine |
US20090120164A1 (en) * | 2007-11-08 | 2009-05-14 | Honeywell International Inc. | Method and system for estimating in-cylinder pressure and knocking utilizing an in-cylinder pressure sensor |
US8150602B2 (en) | 2007-11-08 | 2012-04-03 | Honeywell International Inc. | Method and system for estimating in-cylinder pressure and knocking utilizing an in-cylinder pressure sensor |
US9453453B2 (en) | 2011-07-20 | 2016-09-27 | Yamaha Hatsudoki Kabushiki Kaisha | Internal combustion engine and straddle-type vehicle equipped with the engine |
US9464956B2 (en) | 2011-07-20 | 2016-10-11 | Yamaha Hatsudoki Kabushiki Kaisha | Internal combustion engine and straddle-type vehicle equipped with the engine |
DE102018211169A1 (de) * | 2018-07-06 | 2020-01-09 | Bayerische Motoren Werke Aktiengesellschaft | Verbrennungskraftmaschine für ein Kraftfahrzeug, insbesondere für einen Kraftwagen, sowie Kraftfahrzeug |
US11204295B2 (en) * | 2018-07-06 | 2021-12-21 | Bayerische Motoren Werke Aktiengesellschaft | Internal combustion engine for a motor vehicle, in particular for an automobile, and motor vehicle |
Also Published As
Publication number | Publication date |
---|---|
JPS5871136U (ja) | 1983-05-14 |
JPS6239309Y2 (de) | 1987-10-07 |
DE3271438D1 (en) | 1986-07-03 |
EP0079042B1 (de) | 1986-05-28 |
EP0079042A1 (de) | 1983-05-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: NISSAN MOTOR CO. LTD, NO. 2, TAKARA-CHO, KANAGAWA- Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:HAYASHI, YOSHIMASA;REEL/FRAME:004063/0540 Effective date: 19821022 |
|
FPAY | Fee payment |
Year of fee payment: 4 |
|
REMI | Maintenance fee reminder mailed | ||
REMI | Maintenance fee reminder mailed | ||
LAPS | Lapse for failure to pay maintenance fees | ||
FP | Lapsed due to failure to pay maintenance fee |
Effective date: 19920531 |
|
STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |